OpenAPI Server Variable Object

{
  "$id": "openapi-server-variable.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "OpenAPI Server Variable Object",
  "description": "An object representing a Server Variable for server URL template substitution.",
  "type": "object",
  "required": [
    "default"
  ],
  "properties": {
    "enum": {
      "type": "array",
      "description": "An enumeration of string values for limited variable substitution options.",
      "items": {
        "type": "string"
      },
      "minItems": 1
    },
    "default": {
      "type": "string",
      "description": "The default value to use for substitution."
    },
    "description": {
      "type": "string",
      "description": "An optional description for the server variable."
    }
  },
  "patternProperties": {
    "^x-": {}
  },
  "additionalProperties": false
}